Book Image

Agile Technical Practices Distilled

By : Pedro M. Santos, Marco Consolaro, Alessandro Di Gioia
Book Image

Agile Technical Practices Distilled

By: Pedro M. Santos, Marco Consolaro, Alessandro Di Gioia

Overview of this book

The number of popular technical practices has grown exponentially in the last few years. Learning the common fundamental software development practices can help you become a better programmer. This book uses the term Agile as a wide umbrella and covers Agile principles and practices, as well as most methodologies associated with it. You’ll begin by discovering how driver-navigator, chess clock, and other techniques used in the pair programming approach introduce discipline while writing code. You’ll then learn to safely change the design of your code using refactoring. While learning these techniques, you’ll also explore various best practices to write efficient tests. The concluding chapters of the book delve deep into the SOLID principles - the five design principles that you can use to make your software more understandable, flexible and maintainable. By the end of the book, you will have discovered new ideas for improving your software design skills, the relationship within your team, and the way your business works.
Table of Contents (31 chapters)
Free Chapter
Section 1
Section 2
Section 3
Section 4
Chapter 21
License: CyberDojo

Connascence of Identity

We have Connascence of Identity (CoI) when one or more components must reference exactly one particular instance of another entity to work correctly.

This is the strongest form of connascence in code and it is usually not easy to spot. The code apparently looks fine, but gives errors under certain conditions. The dependency in this case is within the creational context of a particular entity. Given the distributed nature of modern systems, it is almost never a good idea to rely on a particular instance of any object.

Let's see a simple example (and let's forget about thread safety):

public class GlobalCounter{
    int count = 0;
    public void Increment(){
    public int CurrentCount(){
        return count;
public class Controller...